public RadComboBoxData LoadStoreDDL(RadComboBoxContext context)
{
//The RadComboBoxData object contains all required information for load on demand:
// - the items
// - are there more items in case of paging
// - status message to be displayed (which is optional)
RadComboBoxData result = new RadComboBoxData();
LookupDAO lkp = new LookupDAO();
List <KeyValuePair <string, string> > stores = lkp.GetStore();
//Get all items from the Customers table. This query will not be executed untill the ToArray method is called.
var allStores = from store in stores
orderby store.Key, store.Value
select new RadComboBoxItemData
{
Text = store.Key + " - " + store.Value,
Value = store.Key
};
//In case the user typed something - filter the result set
string text = context.Text;
if (!String.IsNullOrEmpty(text))
{
allStores = allStores.Where(item => item.Text.StartsWith(text));
}
//Perform the paging
// - first skip the amount of items already populated
// - take the next 10 items
int numberOfItems = context.NumberOfItems;
var storelist = allStores.Skip(numberOfItems).Take(10);
//This will execute the database query and return the data as an array of RadComboBoxItemData objects
result.Items = storelist.ToArray();
int endOffset = numberOfItems + storelist.Count();
int totalCount = allStores.Count();
//Check if all items are populated (this is the last page)
if (endOffset == totalCount)
{
result.EndOfItems = true;
}
//Initialize the status message
result.Message = String.Format("Items <b>1</b>-<b>{0}</b> out of <b>{1}</b>",
endOffset, totalCount);
return(result);
}
private void populateStoreDDL()
{
LookupDAO lkp = new LookupDAO();
List <KeyValuePair <string, string> > stores = lkp.GetStore();
List <KeyValuePair <Int16, string> > storesconcat = new List <KeyValuePair <Int16, string> >();
foreach (KeyValuePair <string, string> store in stores)
{
Int16 storeid = Int16.Parse(store.Key);
KeyValuePair <Int16, string> listItem = new KeyValuePair <short, string>(storeid, (store.Key + " - " + store.Value));
storesconcat.Add(listItem);
}
rcbStore.DataSource = storesconcat;
rcbStore.DataTextField = "value";
rcbStore.DataValueField = "key";
}